Portable planer



No Model.) 3 sheets-sheet 1 .I

H. B. HUGHHS. PRTABLBl PLANER.

No. 516,815. Patented Mami 20, 1894.

WITESEES;

v3 Sheets-Sheet 2.

(No Model.)

. H.B.HUGHVES. PORTABLE PLANER.

No. 516,815. f "Patented Mar, 20, 1894.

Fia- Q (o Model.) 3 Sheetsf-Sheet 3.

1-1. B. HUGHES. PORTABLEl PLANER.

No. 516,815. y Patented Mar. 2o, 1894.l

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STATES ATENT OFFICE.

HENRY B. HUGHES, OF SCHENECTADY, NEW YORK, ASSIGNOR TO THE GENERALELECTRIC COMPANY, OF BOSTON, MASSACHUSETTS.

p PORTABLE PLAN ER.

SPECIFICATION forming part of Letters Patent No. 516,815, datedA March20, 1894.

` Application filed November '7, 1893. Serial No. 490.32056- (No model.)

l .To all whom t may concern.:

Be it known that I, HENRY B. HUGHES, a citizen of the United States,residing at Schenectady, in the county of Schenectady and State of NewYork, have invented a certain new and useful Improvement in Portable 1Illaners, of which the following is a specificaion.

M y invention relates to apparatus designed to finish the pedestal seatsupon the frame of the dynamo electric machine; I prefer to call it aportable planing apparatus because the principles upon which it worksare substantially the same as `those of the planing machine.

It is well known that the frame of a dynarno-electric machine isexceedingly awkward and inconvenient to handle and to secure in positionupon the bed plate of a planing machine as ordinarily constructed. Insuch machines the field-magnet cores are ordinarily cast or madeseparate from the frame, which is usually of cast iron and is providedwith beds or seats for the field-magnet cores which must be finished toa true surface; in the ordinary four-pole type of multipolar machine, orin any other multipolar machine having an even number of poles, theseats for dia- -metrically opposite field-magnet cores must be trulyparallel in order to preserve the magnetic symmetry of the machine; theframe being usually cast in two pieces which are separately finished andafterward bolted together, the seats for opposite cores come ondifferent pieces andl are difficult to nish properly.

'It is to obviate the objections named that I have devised my presentinvention, which consists of an apparatus which may be mounted in thebearings of the dynamo-electric machine and driven bya shaft rotatingtherein, which shall operatecutting tools to finish those seats or bedsupon the frame; the frame of the apparatus being provided with means forcentering so that the work will be finished up true, and the apparatusis designed to be used after the two parts of the frame are fittedtogether.

In the accompanying drawings, hereby referred to and made part of thisspecification,

Figure l is a side elevation partly in section upon the line 1-1 of Fig.2 of my improved portable planer. Fig. 2 is a plan, partly broken awayand partly in section. Figs. y` and 4 are a side elevation and end viewrespectively of the feed and stop mechanism.

Like letters refer to like parts throughout.

A is the frame of the machine, provided with centering arms, A2 A2; eacharm has at its end a flange A through which projectlagscrews B B, &c.,by the rotation of which the frame may be truly centered.

C is a central shaft carrying a bevel gear C and rotating within asleeve C2, being supported clear from it by the bushings L L, whichserve as bearings to the shaft. Upon the other side of .the frame is asimilar sleeve C2; a solid projection may take the place of the sleevesC2, if desired. The two sleeves are designed to rest in the bearings ofthe dynamo-electric machine and form a firm support for the frame, inconjunction with the arms A2 A2 and the screws B. Meshing with the gearC are two other gears B', B2 which rotate in opposite directions, aswill be readily understood from the drawings; they are carried by acentral shaft D2, which is provided with a split bearing in its center.

Upon each end of the shaft D2 are pinions. marked respectively E, E',each pinion meshing with a rack F, F and serving to drive the rack ineither direction according to the direction o f rotation of the shaft C.

Attached to each rack is a tool holder H set in ways H H and providedwith the usual lost-motion gib H2; each holder `carries a tool H3 set inthe usual manner by bolts and so arranged that when fed it will tilt onits backward traverse, as is customary in machines of this class. Itwill be seen from this description that the rotation of the shaft Cdrives one of the tool-holders forward and at the same time brings theother one back to the beginning of its cut,so that the tools are alwaysworking and no time is lost during the return stroke; there is thereforeno necessity for having a quick return orany increased complication inthe feeding mechanism.

Passing through each tool-holding block H are feed-screws I I', operatedin the usual manner by a star-and-ratchet gear J, striking against afixed lug on the frame at the end of the tool stroke. The feed-screws Ilhave bearings upon the table H', provided with ways and lost motion gibsG2 G2; the table being made in one piece with the racks F F. Referringto Fig. 2, the operation of the shifting bar will be apparent. 'lhereinM is a'lug or projection secured to the tool-carmage or table H andmoving back and forth with it as it is driven by the rack and pinion; M1s a bar passing through the bearings K K, which it will be observedfrom Fig. l are duplicated upon the other side of the machine. M2 M2 aremovable stops secured by setscrews to the bar M, with which theprojection M engages as the tool-carriage nears the end of its stroke.Referring also to Figs. 3 and 4,N is a shiftlng bar attached by thesplit collar N to the bar M, and communicating its motion to the bar R,which slides back and forth in bearings formed upon the frame whichcarries the pulleys P P P2 and the back gears O O. Q Q areshifting-forks for the usual crossedbelt arrangement by which thereversal of motion is obtained. Upon the bar R are formed cams R R2co-operating with tilting levers Q2 Q8 attached to the shifting forks QQ. The operation of this part of the apparatus is as follows: When theprojection M left, moving the levers Q2 Q3 and the beltvolving thereinadapted to rest in the bearshifting forks Q Q; the pulley P is anidlerpnlley, while the pulleys P P2 are keyed to the shaft. Thus one ofthe belts, which run in opposite directions, is always upon theidler-pulle`y and as the belt-shifting forks are thrown to the left theuncrossed belt, for example, will operate the pulley P and the crossedbelt will run on the idler-pulley, while when the shifting-forks arethrown to the rightthe crossed belt will be on the pulley P2 and thestraight belt on the idler-pulley. The forks are thrown to the rightwhen the tool carriage passes to the right in Fig. 2 and its stopengages with stop M2 on the shifting bar. The duplicate bearings K Kupon the other side of the machine are provided so that when the frameis shifted to bring the tools where the lag screws BB bear in thedrawings, thus shifting the screws ninety degrees in position, the bar Mmay be removed from the bearings K K' and put into the bearings K K andwill then operate in the same way, so that instead of having tworeversing arrangements the same one may be employed.

I have found the arrangement described simple and efiicacious; it may bereadily put into place, is rapid in its operation and may be built forless than one-sixth the cost of a planing machine of ordinary styleadapted to do the same amount of work, at the same time taking up verymuch less shop room.

Having thus described my invention, what I claim as new, and desire toprotect by Letters Patent of the United States, is-

` revolving therein arranged to rest in the bearings of thedynamo-electric machine, toolcarrying heads traversed thereby, andoperating mechanism, consisting of suitable gears, racks and pinionsconnecting the shaft and the head.

t. The combination of a frame adapted to tit within the frame of adynamo-electricmachine, means of centering such, frame, a shaft'revolvin g therein arranged to rest in the bearings of thedynamo-electric machine, toolcarrying heads traversed thereby, andoperating mechanism, consisting of suitable gears, racks and pinionsconnecting the shaft and the heads and arranged to drive them inopposite direction.

5. The combination of a frame, a shaft reings of a dynamo-electricmachine and driving a bevel gear, two other gears driven' 1n oppositedirections by such bevel-gear,racks and pinions operated by such gears,and toolcarrying heads, attached to such racks.

G. The combination of a frame, a shaft journaled therein and driving abevel-gear, and two gears rotated in opposite directions, suchbevel-gear each driving a pinion meshing with a rack carrying atool-head; whereby the tool-heads are driven in opposite directions sothat one tool cuts during the backtraverse of the other.

7. The combination of a frame, a shaft revolving therein adapted to restin the bearings of a dynamo-electric machine, racks connected to suchshaft by gearing adapted to move them in opposite directions, andtoolcarrying heads arranged to have transverse motion upon suitabletables attached to the racks.

8. The combination of a frame adapted to tit within the frame of adynamo-electric machine, a shaft revolving therein adapted to rest inthe bearings of the machine, racks connected to such shaft by suitablegearing, tool-carrying heads arranged to have transverse motion ontables attached to the racks,

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and feedscrews on such tables adapted to projection upon thetool-mechanism adapted traverse the tool-carrying heads. to strike thestops and reverse the motion,

9. The combination of a frame adapted to substantially as described. twithin the frame of a dynamo-electric ma- In witness whereof I havehereunto set my 5 chine, a shaft revolving therein adapted to hand this31st day of October, 1893.

rest in the bearings of the machine, racks f "1 connected to the shaftby suitable gearing, HEL RY B' HUGHEb' tool-carrying heads traversed inone line by Witnesses: y such racks and in another line by a feed-WILLIAM S. BARGER,

ro screw, a reversing bar carrying stops and a H. S. ARENTZ.

